Wow, you joined in 2004 and only have 13 posts
The earlier 2nd gen LH vehicles(esp 300M and LHS) quite often came with a power port inside the armrest between the front seats. That is where I plug in my cell phone charger on my 2002 Limited. I pulled the parts from an LHS in the junkyard to upfit my 2004 SXT with it. That port always has power to it.
If you got some sort of universal power port, you could probably add it in the glove box or in the armrest where the factory put the second port
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